Pneumatic shock absorber



Sept. 7 1926.

A A. A: TURNAGE PNEUMATIC SHOCK ABSORBER Filed Dec. 5l, 1924 e ,a /Mf Stratum* UNITED. STATES PATENT OFFICE.

ALFRED A. TURNAGE, OF SAN FRANCISCO, CALIFORNIA.

PNEUMATIC SHOCK ABSORBER.

Application led December 31, 1924. Serial No. 759,063.

The present invention has for its object to neutralize shock and vibration of a vehicle wlientraveling over a rough surface or passing over an obstruction or dropping into a rut or depression in the surface of a road,V the same being accomplished by the provision of a shock absorber which also operates as a snubber to control the rebound incident to traiiic, thereby preventing in` jury to springs and discomfort to the occupants of the vehicle. Y

Other objects and advantages will be apparent and suggest themselves as the nature of the invention is understood.

lVhile the drawings illustrate an embodiment of the invention it is to beunderstood that in adapting the same to meet different conditions and requirements, various changes in the form, proportion, and minor details of construction may be resorted to.

without departing` from thenature of the invention.

Referring to the accompanying drawings forming a part of the specification,

Figure l is a front view of`a combined shock absorber and snubber embodying the invention,

Figure 2 is a vertical central sectional view of the device, and

Figure 3 a transverse sectional view on a. plane indicated by the line 3-3 of Figure 2'.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

The numeral l designates an outer cylinder which is provided at opposite ends with plungers 2 and 3, the plunger 2 forming part of a cap 4 which is threaded or otherwise attached to the upper end of the cylinder' 1. A bracket 5 provides means for attaching the cylinder to the body of the vehicle. The numeral 6 denotes an inner cylinder, the ends of which are formed with centrally disposed openings to receive the respective plungers 2 and 3. A cap 7 fitted to the upper end of the inner cylinder 6 is formed With an opening to receive the plunger 2. The Vlowerend of the inner cylinder 6 has an eXtensionS adapted to be attached to a spring 9 of thevelicle. A bag l0 preferably of rubber is located Within-the inner cylinder 6' and its ends sustain the thrust of the plungers 2 and 3, the bag 10 being supplied with air under pressure. An air valve ll is connected to the upper end of the bag l() and passes through slidably engaging the plunger 2 and provides for supplying air to the bag as occasion may require. The threads on the valve stem l1 are designed for connectionV of an air pumi nozzle thereto and do not engage the cap nut on the upper end of the cap 4E The invention contemplates a set ofy four ot' the devices to each vehicle, one being located adjacent each corner of the, chassis, the weight normally being supported upon the upper ends of the air bag l0 and when the body moves downwardly the air in the bag is compressel and upon the rebound` the lower plungers 3 move upwardly thereby compressing the air 1n the bag from besor connected to the ends of the outer cylinder and adapted to operate through openings formed in the ends of the inner cylinder, the upper plunger having an opening therethrough to receive the valve stem ofthe air bag.

In testimony whereof I aiiiX my signature.

ALFRED A. TURNAGE. 

